Bolt



July 3l, 1923- G. E. CARTER Filed Oct. 17, 1919 patented duly El, i923.

.auraV GEORGE E. CAR-TER, OFCIRGLEVILLE, OHIO.

BOLT.

Application filed October 17, 1919. Serial 110.331,258.

To all whom it may concern Be it known that GEORGE E. CARTER, a citizen of the United States, residing at Circleville, in the county of Pickaway and State of Ohio, has invented certain new and useful Improvements in Bolts, of which the following is a specification.

This invention relate-s broadly to bolts and other similar screw threaded fastening` devices, and the underlying object of the ill.- vention resides in so constructing the shank of a bolt or a securing device in such manner that the application and securing of a castellated nut thereto may be accomplished in an expeditious and labor saving manner.

Another object of the invention reside-sin the provision of a bolt wherein the-end of its shank is provided with a plurality of transversely extending openings, which are so positioned as to be capable of receiving a cotter pin or other device employed in the fastening of a castellated nut upon said shank, and iniinally providing the extreme outer end of the latter with a longitudinally extending chamber so disposed as to intersect said pin receiving openings, the outer end of said chamber being open so that said openings may be clearly viewed and the operation of inserting the pin' therethrough thus facilitated.

For a further understanding of the invention reference is to be had to the followingd description and to the accompanying drawing, in which similar characters of ref` ercnce denote like and corresponding parts:

Figure l is an end view of a bolt construct` ed in accordance with the principles ofthe present invention and disc-losing a castellated nut positioned thereon,

Fin-ure 2 is a fragmentary vertical sectional view taken through the shank end of a` bolt formed in accordance with the principles of the present invention,

Figure 3 is an end elevation of a modified forni of bolt, and

Figure l is an elevation of the supporting; die which is utilized in bracing the bolt during the` process of forming the pin receivinnr openings.

Hitherto, it has been the common practice in securing a castellated nut upon the threaded shank of a bolt to merely provide the latter with one or more pin receiving openings, which are so disposed as to pass transversely through said bolt and at positions appreciably spaced from the end of the bolt shank. By kvirtue of this construction a cotter pin or the like could be passed through theI castellated slots` formed in the nut and thence through. at least one of the openings formed in the bolt, whereby a posi-` tive securing of thenut in position upon said bolt could be effected. Howevenfthe task of registering the slots .of a cast'ellated nut'with the pin receiving opening formed in the bolt has always been a source of considerable diiiiculty, owing to the fact that the opening in the boltissubstantially. concealed, and that theoperator is thereforelcaused to continually adjust the nut backand forth until true registry has been vobtained between the slots of the nut andthe opening in the bolt. ThisA taskyobviously,` has `been one which has taken up considerable time and hence-has been comparatively costly by reason of the timev lost in` effecting registry between the pin receiving portions of the nut and bolt. 1 Accordingly, .itis the main purn pose of the present invention toconstruet a bolt so that `an operator may instantly ascertainvthe correct .position of a nuty upon said bolt so' that regist-ration. of `pin receivfk ingv parts` maybe instantly and readily determined, thereby reducing the timerequired to-lock a nut upon a. bolt to aminimum.

Vith thel above object.A among others,'in

view, the present-invention consist of a bolt or other similar fasteninga device lv, which maybe of anysuitableor desired configuration or rsize andv is provided with the usual nut receiving threaded shank f2, the l latterbeing` formed for the reception ofl a castellated nut 3. In the present instance, the extreme outer end ofthe shankisgprovided with a longitudinally extending Chaniber or chamberedportion `whose aXis is disposed in p arallelismwith thelongitudinal axis of the shank. The chamber 4 mayex- `tend inwardly ofsaid shankvaforf any suit# 'main longitudinal aXis of the shank. It will be observed, upon reference to the drawing, that the outer end of said chamber is` open, so that the interior of the chamber and the openings 6l may be clearly viewed from an exterior inspection. By the provision of the chamber t it will be apparent that the latter will intersect the opening 6 or the planes thereof.

From the foregoing, it will be apparent that a castellated nut 7 may be threaded upon the shank 2 in the ordinary manner. In large assembly 'plants this is mainly doneL by means' of automatic machines. ',lbweve'r, when it cornesto the aligning of the" slotsS of the nut 7 with the openings 6', ,the operator willv be enabled to ylocate the positions of the openings 6 by merely mspecting the latter through 'the chamber a, and' hence will be `enabled to rotate the nut tothe nearest' of said openings in order that its s'lotslS` will register therewith. When this 'i's'kdon'eta cotter pin', securing key or other device mayv be driven through the registering`- slots 8* and the openings' 6 and secured in the ordinary manner so as to prevent undue rotation of the nut 3 upon the bolt 1,. It follows from the above that the locations of the openings 6 may be clearly and instantly ascertained by the provision ,c of a chamber l yand similarly, the relative positions ot' alignment which may exist be'- tweenthe slots- StandY the openings` 6 may also be *observed Yand governed. Hence, the main characteristic of the present invention resides in theI provision ot the sight chamber 4' in the end of a bolt which is so locatedV as to intersect the pin receiving penings" and to enable the latter to be readily viewed and determined when the same are concealed by the positions which the nutB', may occupy thereon. Therefore,

l and will4 eliminate the provision of said chamber will eliminate the necessity of the operator feeling out for' the location of the` holes or openings 6 lthe uncertainty ofv this operation by rendering the location ot said ho'jlesor openings definite and readilyobstnv'vable. y The bolts may be produced vin large q'dantiti'cs on an automatic screw inaand.y .th Chambers, 4l may be tormed therein during' their 'Mdm-ary process 0f formation, hence, the provision of the chainbcrs' t will not involve anl added operation iii-bolt manufacture tllius enabling said bolts to be prodiiced vat prevailingl costs. Howeve, by reducing thema-ferial in the end of a shank so as to form the chamber 4, it

is possible to punch the openings 6 therein, instead ot drilling the same as has been necessary in the past, so that in reality the inal cost of a bolt in which pin receiving openings are formed is capable of being reduced as regards present standards. However, I do not limit myself to this method of forming the opening 6, as it is obvious that the latter may be drilled or pressed out it' it is so desired. Also, as many of the openings 6 may be employed in the wall 5 as is desired, in Figure 1 two sets are shown which provide twelve locking positions on the part ot the nut 3, but in Figure 3 three sets of the openings 6 have been disclosed, which produce eighteen locking positions Ytor said nut, as will be obvious. In Figure 31 the holes or openings are preferably forty degrees apart, asv this has been found to be the most desirable arrangement when three sets ci openings are employed. From the above it will be gathered that the present information provides a bolt to which a castellatednut may be quickly and conveniently applied and locked, and that through the provision of the sight chamber l advantages are to' be had in the positioning of the nut in locking relationship with respect toV the openings 6 and that facility is to be had in the formation of the openings 6 themselves. Il' desired, a recess die 9 may be inA serted into the chamber l of the bolt prior to the operation of punching out the pin receiving openings 6', this die will have the desired' effect of strengthening the relatively thin Walls of the chamber a during the punching operations.

What I claim is:

As a new article of manufacture, a bolt including a threaded shank, said shank hav- .ing its extreme outer end provided with a chamber extending longitudinally into said shank, said chamber being ol' sutlicient sine to produce a relatively thin circumferential Wall upon the end of the bolt, and said Wall having a plurality ot radially disposed circui'n'lcrentially spaced openings tormed oponen n. CARTER. 

